I know there are fans of Joss Whedon here, so I figured I'd post about his new internet mini-series "Dr. Horrible's Sing-Along Blog" starring Neil Patrick Harris as Dr. Horrible, Nathan Fillion as Captain Hammer, and Felicia Day as Penny.
Dr. Horrible is a villain who is applying to get into the Evil League of Evil, but has a crush on a girl at the local laundromat. Captain Hammer is his arch-nemesis. Oh, and it's a musical, so if you liked the Buffy episode "Once More, With Feeling", you will probably love this.
Act I went up Tuesday, Act II went up today (Thursday), and Act III will be posted on Saturday. They will all be taken down on Sunday, and will only be available for purchase from iTunes for now, but a DVD will come later
PS If you're having trouble placing Felicia Day, she played the Potential Slayer "Vi" in the final season of Buffy.